swingutils.java

《j2ee开发全程实录》随书源码

/* ===========================================================
 * JDBMonitor : a flexiable JDBC Monitor for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2006-2006, by yang zhongke
 *
 * Project Info:  http://www.cownew.com
 *
 * This library is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by 
 * the Free Software Foundation; either version 2.1 of the License, or 
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but 
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ---------------
 * SwingUtils.java
 * ---------------
 * (C) Copyright 2006-2006, by yang zhongke
 *
 * Original Author:  yang zhongke;
 *
 * Changes
 * -------
 *
 */
package com.cownew.ctk.ui.swing;

import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.KeyboardFocusManager;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.List;
import java.util.Vector;

import javax.swing.ButtonGroup;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JMenu;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.ListModel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.UIManager.LookAndFeelInfo;

import org.apache.commons.lang.enums.EnumUtils;

import com.cownew.ctk.common.ExceptionUtils;
import com.cownew.ctk.common.StringEnum;

public class SwingUtils
{
	/**
	 * make Container frame in the center of the owner
	 * 
	 * @param owner
	 * @param frame
	 */
	public static void centerInParent(Container owner, Container frame)
	{
		Rectangle parentRect = owner.getBounds();
		Point pos = new Point();
		pos.setLocation(parentRect.x + parentRect.width / 4, parentRect.y
				+ parentRect.height / 4);
		frame.setLocation(pos);
	}

	public static void centerAtScreen(Window window)
	{
		if (window != null)
		{
			Dimension scrDim = Toolkit.getDefaultToolkit().getScreenSize();
			Dimension windowDim = window.getSize();
			window.setLocation((scrDim.width - windowDim.width) / 2,
					(scrDim.height - windowDim.height) / 2);
		}
	}

	/**
	 * init the JFrame size
	 * 
	 * @param frame
	 */
	public static void initWindowSize(JFrame frame)
	{
		Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
		frame.setBounds((int) dim.getWidth() / 4, (int) dim.getHeight() / 4,
				(int) dim.getWidth() / 2, (int) dim.getHeight() / 2);
	}

	/**
	 * int the submenu of the LookAndFeel Menu(menuItemSkin)
	 * 
	 * @param owner
	 * @param menuItemSkin
	 */
	public static void initLookAndFeelMenu(final Component owner,
			JMenu menuItemSkin)
	{
		LookAndFeelInfo[] skins = UIManager.getInstalledLookAndFeels();
		ButtonGroup btnGroupSkins = new ButtonGroup();
		for (int i = 0, n = skins.length; i < n; i++)
		{
			final LookAndFeelInfo skinInfo = skins[i];
			JRadioButtonMenuItem menuItem = new JRadioButtonMenuItem(skinInfo
					.getName());
			if (i == 0)
			{
				menuItem.setSelected(true);
			}
			btnGroupSkins.add(menuItem);
			menuItem.addActionListener(new ActionListener() {

				public void actionPerformed(ActionEvent e)
				{
					try
					{
						UIManager.setLookAndFeel(skinInfo.getClassName());
						SwingUtilities.updateComponentTreeUI(owner);
					} catch (ClassNotFoundException e1)
					{
						throw ExceptionUtils.toRuntimeException(e1);
					} catch (InstantiationException e1)
					{
						throw ExceptionUtils.toRuntimeException(e1);
					} catch (IllegalAccessException e1)
					{
						throw ExceptionUtils.toRuntimeException(e1);
					} catch (UnsupportedLookAndFeelException e1)
					{
						throw ExceptionUtils.toRuntimeException(e1);
					}
				}

			});
			menuItemSkin.add(menuItem);
		}
	}

	/**
	 * return all the elements in JList as Vector
	 * 
	 * @param list
	 * @return
	 */
	public static Vector getItemVector(JList list)
	{
		ListModel model = list.getModel();
		Vector vector = new Vector(model.getSize());
		for (int i = 0, n = model.getSize(); i < n; i++)
		{
			vector.add(model.getElementAt(i));
		}
		return vector;
	}

	public static void setChildEnabled(Container parent, boolean editable)
	{
		for (int i = 0, n = parent.getComponentCount(); i < n; i++)
		{
			Component comp = parent.getComponent(i);
			if(comp instanceof Container)
			{
				setChildEnabled((Container) comp,editable);
			}
			comp.setEnabled(editable);
		}
	}
	
	/**
	 * 得到当前激活的窗口
	 * @return
	 */
	public static Window getActiveWindow()
	{
		return KeyboardFocusManager.getCurrentKeyboardFocusManager()
				.getActiveWindow();
	}
	
	/**
	 * 选择JComboBox中等于(==或者equals)obj的项
	 * @param box
	 * @param obj
	 */
	public static void setSelectedItem(JComboBox box,Object obj)
	{
		if(obj==null)
		{
			box.setSelectedIndex(-1);
			return;
		}
		for(int i=0,n=box.getItemCount();i<n;i++)
		{
			Object item = box.getItemAt(i);		
			if(obj==item||obj.equals(item))
			{
				box.setSelectedIndex(i);
				return;
			}
		}
	}
	
	/**
	 * 用枚举类型填充combobox,填充之前删除原有数据
	 * @param box
	 * @param enumClass 枚举类型名,必须是StringEnum的子类
	 */
	public static void fillWithEnum(JComboBox box, Class enumClass)
	{
		fillWithEnum(box,enumClass,true);
	}
	
	/**
	 * 用枚举类型填充combobox
	 * @param box
	 * @param removeOthers 是否填充之前删除原有数据
	 * @param enumClass 枚举类型名,必须是StringEnum的子类
	 */
	public static void fillWithEnum(JComboBox box, Class enumClass,
			boolean removeOthers)
	{
		if (removeOthers)
		{
			box.removeAllItems();
		}

		if (!StringEnum.class.isAssignableFrom(enumClass))
		{
			throw new IllegalArgumentException(
					"enum Class must inherited from Stringenum!");
		}
		List list = EnumUtils.getEnumList(enumClass);
		for (int i = 0, n = list.size(); i < n; i++)
		{
			box.addItem(list.get(i));
		}
	}

}